Muffler.



No. 768,013. PATENTED AUG. 16, 71904.

N. T. HARRINGTON.

MUFFLER.

APPLICATION FILED MAR. 21 1904. I0 IODEL.

WlTHESSES INVENTOR ATT'Y.

Patented August 16, 1904.

UNITED STATES PATENT OEETcE.

NORMAN T. HARRINGTON, OF DETROIT, MICHIGAN, ASSIGNOR TO OLDS MOTOR WORKS, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

MUFFLER.

SPECIFICATION forming part of Letters Patent No. 768,013, dated August 16, 1904.

Application filed March 21, 1904:. Serial No. 199,2l4. (N0 model.)

To all whom, it may concern:

Be it known that I,NORMAN T. HARRINGTON, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and use-.

ful Improvements in Mufflers, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to mufllers; and it consists in the novel construction as hereinafter set forth.

In the drawings, Figure 1 is alongitudinal section through the muffler. Fig. 2 is a side elevation thereof.

A is a drum or cylindrical shell formed from sheet metal.

B, C, D, and E are heads fitting within the shell A and provided with peripheral flanges a, which are riveted or otherwise secured to the shell. These heads are preferably dished and have centrally formed therein an aperture surrounded by a turned flange Z). Two of the heads B and E are arranged at the opposite ends of the shell, while intermediate heads C and D are respectively spaced from heads B and A, so as to form therebetween the chambers F and G. Between the heads C and D is formed a large central chamber H.

I is a tubular stem adapted to fit within the flanges 7) and which passes centrally through the drum and the heads, being provided at its opposite ends with threaded portions 0, engaging clamping-caps J. Sleeved upon the stem I, respectively between the heads B, O, D, and E, are the spacing-collars K and L. These collars are chambered, so as to form an annular channel surrounding the stem, which communicates through apertures (Z with the chambers between the heads. The stem I is also provided with apertures e, which connect the space within the stem with the chamber in the collar.

M is the exhaust-conduit from the engine, which is connected to the central chamber H of the drum, and N is the discharge-conduit connecting with the chamber F.

With the construction described the parts may be readily assembled by first placing the inner heads O and D within the shell (0 and riveting or otherwise securing them in posi tion and then placing the stem in position with the collars K and L thereon, then sleeving the outer heads B and E on the stem and moving them against collars K and L, after which they may be secured to the shell by riveting or otherwise. Finally, the caps J may be engaged with the threaded ends of the stem and suitable packing material f may be placed between said caps in the heads B and E to form a tight joint.

The assembled parts form a strong structure, as all of the heads are rigidly secured together by the stem I. The drum may be supported by suitable hangers, such as O, which may be apertured at their lower ends and engage with the stem I and between the caps J and end heads.

In operation the exhaust products are first conveyed to the'central chamber H of the drum. From this chamber they pass through a series of apertures g in the head D into the chamber G between said head and outer head E. From this chamber the products pass inward through the apertures (Z into the chambered collar L and thence through the aperture (1 into the hollow stem I. From the stem I they pass to the opposite end of the drum and through the apertures 11, chambered collar K; and aperture (Z into the chamber F and from the latter pass outward through the discharge-conduit N.

I/Vhat I claim as my invention is- 1. A mufl'ler comprising an outer drum or shell, a plurality of heads secured within said shell and dividing the space therein into separate compartments, and a tubular stem passing completely through said drum and heads mechanically tying said heads and pneumatically connecting the separate compartments.

2. A muflier comprising an outer drum or shell a plurality of heads secured therein and dividing the space into separate compartn1ents,and a tubular stem passing through said heads and tying together the outer heads, and a chamber-spacing collarbetween an outer head and intermediate head, said stem and collar being apertured to form a pneumatic connection between the separate compartments.

3. A muffler comprising an outer drum or shell, the head secured within said shell inter- 5 mediate the ends thereof a tubular stem passing through said head, a chamber-collar sleeved on said stem, an end head bearing against said collar, a head for the opposite end of the drum, and clamping means at the ends of said IO stem for tying said end heads together, said stem being apertured to pneumatically connect the chambers within said drum on opposite side of said intermediate head.

4. A muiiier comprising an outer drum or 5 shell, the heads B C D and E secured to said shell, the tubular stem I passing through'said heads, the chambered collars K and L respectively intermediate the heads B C D and E, and communicating with the chambers between said heads and with apertures in said tubular stem, the head D being apertured, caps at the opposite ends of said tubular stem and inlet and exhaust connections with said drum respectively communicating with the chamber between the heads C and D, the chamber between the heads B and C.

In testimony whereof I aflix my signature in presence of two witnesses.

NORMAN T. HARRINGTON.

Witnesses:

JAs. P. BARRY, H. 0. SMITH. 

